Meta's new Threads, a rival for X, is now Apple's most downloaded app

• Threads, built on the back of Instagram and launched in July, may have staying power.
• The new Meta platform recently became available in the EU, seeing a surge in downloads.
• It's a direct rival of X, or Twitter, which continues to see downloads and users fall.

Threads this week became the most popular app in Apple's US app store, showing the X rival is gaining traction in the wake of Elon Musk's chaotic takeover of Twitter.